add ssh rc script to fix SSH_AUTH_SOCK on remote hosts

README.md

@@ -79,4 +79,7 @@ will result in green text. Use `$CLEAR` to clear previous escape sequences add B
 name to use **bold** and U to underline (examples: $BRed, $UBlack for bold red and underlined black)
 3. Type `esc` twice to add `sudo` before the current command
 4. Autoupdate script running every two weeks, autoupdate function: dotfiles_selfupdate (or `git pull` from `$DOTFILES` folder)
-5. 
+5. Automatic fix of the `SSH_AUTH_SOCK` enviroment variable: `~/.ssh/rc` is installed run on every ssh login,
+and updates a symlink pointing (`~/.ssh/ssh_auth_sock`). `SSH_AUTH_SOCK` points to this (set in `brethil_dotfile.sh`).
+The idea is that if the user is logging in using ssh -A, and using tmux, it will be possible to use
+the remote socket over different sessions by always using the symlink.

brethil_dotfile.sh

@@ -24,7 +24,9 @@ export EDITOR="vim"
 
 export HISTSIZE=100000
 export LANG=en_US.UTF-8
-
+if [[ $SSH_CLIENT ]]; then
+    export SSH_AUTH_SOCK=$HOME/.ssh/ssh_auth_sock
+fi
 
 plugins=($shared_plugins $os_extra)
 

install.sh

@@ -87,9 +87,20 @@ function create_ssh_config {
     fi
 
     exec 3>&1 # save stdout file descriptor
+
+	# add the ssh rc that symlinks the used SSH_AUTH_SOCK. This will be executed on every ssh login.
+	# The idea is that if the user is logging in using ssh -A, the symlink will point to the correct
+	# location of the ssh auth socket and the remote ssh agent will be used.
+    # SSH_AUTH_SOCK is declared in brethil_dotfile.sh
+    exec 1>>~/.ssh/rc
+	echo '#!/bin/bash'
+	echo 'if test "$SSH_AUTH_SOCK" ; then'
+    echo '	ln -sf $SSH_AUTH_SOCK ~/.ssh/ssh_auth_sock'
+	echo 'fi   '
+	chmod 755 ~/.ssh/rc
+
     exec 1>>$ssh_config # redirect everything below to the $ssh_config file
-    if [[ "$modifyssh" != "n" ]]
-    then
+    if [[ "$modifyssh" != "n" ]]; then
         echo "# brethil's dotfiles setup start"
         echo 'TCPKeepAlive=yes'
         echo 'ServerAliveCountMax=6'
@@ -205,6 +216,9 @@ function brethil_dotfiles_setup {
         sed -i 's/set -g terminal-overrides/#set -g terminal-overrides/' /usr/share/byobu/profiles/tmux
     fi
 
+    # remove ls from the grc.zsh config:
+    sed 's|ls \\|#ls \\|' /etc/grc.zsh
+
     # Set m and M to enable/disable mouse mode in tmux/byobu
     echo 'bind-key m source $BYOBU_PREFIX/share/byobu/keybindings/mouse.tmux.enable \; display-message "Mouse: ON"' >> ~/.tmux.conf
     echo 'bind-key M source $BYOBU_PREFIX/share/byobu/keybindings/mouse.tmux.disable \; display-message "Mouse: Off"' >> ~/.tmux.conf